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This is a pure-Python, open source and free implementation of v1/v2c/v3 SNMP engine distributed under 2-clause BSD license.
The PySNMP project was initially sponsored by a PSF grant. Thank you!
Features, specific to SNMPv3 model include:
The PySNMP software is freely available for download from PyPI and GitHub.
Just run:
$ pip install pysnmp
to download and install PySNMP along with its dependencies:
Besides the library, command-line SNMP utilities written in pure-Python could be installed via:
$ pip install snmpclitools
and used in the very similar manner as conventional Net-SNMP tools:
$ snmpget.py -v3 -l authPriv -u usr-md5-des -A authkey1 -X privkey1 demo.snmplabs.com sysDescr.0
SNMPv2-MIB::sysDescr.0 = STRING: Linux zeus 4.8.6.5-smp #2 SMP Sun Nov 13 14:58:11 CDT 2016 i686
PySNMP is designed in a layered fashion. Top-level and easiest to use API is known as hlapi. Here's a quick example on how to SNMP GET:
from pysnmp.hlapi import *
iterator = getCmd(SnmpEngine(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ContextData(),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)))
errorIndication, errorStatus, errorIndex, varBinds = next(iterator)
if errorIndication: # SNMP engine errors
print(errorIndication)
else:
if errorStatus: # SNMP agent errors
print('%s at %s' % (errorStatus.prettyPrint(), varBinds[int(errorIndex)-1] if errorIndex else '?'))
else:
for varBind in varBinds: # SNMP response contents
print(' = '.join([x.prettyPrint() for x in varBind]))
This is how to send SNMP TRAP:
from pysnmp.hlapi import *
errorIndication, errorStatus, errorIndex, varBinds = next(
sendNotification(
SnmpEngine(OctetString(hexValue='8000000001020304')),
UsmUserData('usr-sha-aes128', 'authkey1', 'privkey1',
authProtocol=USM_AUTH_HMAC96_SHA,
privProtocol=USM_PRIV_CFB128_AES),
UdpTransportTarget(('demo.snmplabs.com', 162)),
ContextData(),
'trap',
NotificationType(ObjectIdentity('SNMPv2-MIB', 'authenticationFailure'))
)
)
if errorIndication:
print(errorIndication)
We maintain publicly available SNMP Agent and TRAP sink at demo.snmplabs.com. You are welcome to use it while experimenting with whatever SNMP software you deal with.
$ python3 examples/hlapi/asyncore/sync/manager/cmdgen/usm-sha-aes128.py
SNMPv2-MIB::sysDescr.0 = SunOS zeus.snmplabs.com 4.1.3_U1 1 sun4m
$
$ python3 examples//hlapi/asyncore/sync/agent/ntforg/v3-inform.py
SNMPv2-MIB::sysUpTime.0 = 0
SNMPv2-MIB::snmpTrapOID.0 = SNMPv2-MIB::warmStart
SNMPv2-MIB::sysName.0 = system name
Other than that, PySNMP is capable to automatically fetch and use required MIBs from HTTP, FTP sites or local directories. You could configure any MIB source available to you (including this one) for that purpose.
For more example scripts please refer to examples section at pysnmp web site.
Library documentation and examples can be found at the pysnmp project site.
If something does not work as expected, please open an issue at GitHub or post your question on Stack Overflow or try browsing pysnmp mailing list archives.
Bug reports and PRs are appreciated! ;-)
Copyright (c) 2005-2019, Ilya Etingof. All rights reserved.
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